At 26, irregular periods can be caused by various factors, such as hormonal imbalances (like PCOS), thyroid issues, stress, or lifestyle changes. Because treatment depends entirely on the underlying cause, I strongly advise against self-medicating. Taking hormonal pills without a proper diagnosis can disrupt your cycle further. I highly recommend consulting a gynaecologist. They will likely suggest a pelvic ultrasound and hormone blood tests to identify the root cause. Once diagnosed, they can prescribe the appropriate therapy, such as oral contraceptives, progesterone, or lifestyle modifications, to safely regulate your cycle.